To expand, I think for our first efforts this weekend, it'd be good to have at least one tube-on-wire entry.
My gut feeling is that the difficulty inherent in that (removing the wire, then replacing it and tightening it down again) is going to be such that it won't be a really viable thing if we have more than a few people involved. I could be wrong, though, and I'd like to see it this time so we can discover if that's the case or not.
Hanging the racer on a fixed wire must be part of the challenge. Threading and crimping for each run is not viable. (ok there are ways to do everything but that is just to much work)